chore: Enhance CI workflow with database schema initialization and testing dependencies

This commit updates the CI workflow to include a step for initializing database schemas, ensuring that the necessary database structure is in place before running tests. Additionally, it installs `pytest` and `httpx` as testing dependencies, improving the testing environment. These changes contribute to a more robust CI process and enhance the overall development workflow.

.gitea/workflows/ci.yml

@@ -184,6 +184,7 @@ jobs:
         run: |
           apt-get update && apt-get install -y postgresql-client
           pip install --no-cache-dir -r requirements.txt
+          pip install --no-cache-dir pytest httpx
 
       - name: Audit Python dependencies
         run: |
@@ -191,6 +192,12 @@ jobs:
           pip-audit --desc || true
         continue-on-error: true
 
+      - name: Initialize database schemas
+        run: |
+          export PYTHONPATH=$(pwd)
+          python -c "from backend.db.models import Base; from backend.db.session import engine; Base.metadata.create_all(bind=engine)"
+          echo "✅ Database schema initialized"
+
       - name: Run backend tests
         run: |
           export PYTHONPATH=$(pwd)